Theories Definition and 486 Threads

Any suggestions on where I can find general descriptions of relational theories please?

Steven Hawking's / MKaku. Who's right about Black Holes? Does Prof. Steven Hawking's revised Theory of Black Holes rule out the existence of parallel universes? What about the Two Big Bang Theory by Dr. Raj Baldev, what implications does this theory have for M Theory.

Can a rank 2 field be considered, in principle, to be the dot product of two rank 1 vector fields?

I find discussing the beginning and continuation of the universe one of the more interesting aspects of physics. Also the fact nobody really has any concrete proof as to much of where the universe is going, its boundaries, its expansion. Alot of people have their own ideas or beliefs, and i'd...

i'm interested in any alternative theories re: dark matter...is it possible that we simply have misunderstood gravity at these distances? it seems strange to me that we look for symmetry in the physical laws and so we see something we can't explain using the law of gravitation and our...

Can someone please explain to me the current theories of Time? I have an idea I want to put forward to you all, but need to get a little groundwork in first. Based purely on what I learned in school, time is currently veiwed as linear, if so, how is this even possible? Much appreciated, thanks.

how are quantum theories applied to everyday life? in the physical, biological and chemical systems? like how does quantum theory explains the existence of parallel realities or universe?

Hi. Could someone please post a quick summary of which string theories are out there and how they relate to each other? I could only find partial information on this... Thank you.

So don't be surprised if it's crap.In fact I know it's crap,I just need proper physics people to confirm it's crapness. :redface: Think of a hollow cylinder.There are springs on the bottom and top surfaces of the cylinder,meaning that if a ball was inside it would bounce back and forth.It is...

Gravity Probe B is due to be launched on Monday, 19 April, 2004. Many years in development, it is intended to provide good tests of "two extraordinary, unverified predictions of Albert Einstein's general theory of relativity." Many posters to PF have difficulties with GR; several have...

Hi, India rarely helps scientific advancement. Recently this country has made some wonderful advances in the field of missile technology and information technoloy. Their recognition has become strong now. Indians are now more popular in American due to outsourcing issue. Similarly some...

Is it strange that there are exactly the same number of superstring theories as there are known quarks?

Bell thought that maybe non-local hidden variable theories might have something to say, even though local hidden variable theories have been shown to be unable to properly describe nature. well, what exactly would you mean by a non local hidden variable theory? where exactly does the...

anyone familiar with this place in florida and the theories on magnetism the man whou built it espoused? http://www.fortunecity.com/greenfield/bp/16/coralcastle.htm

--------------------------------------------------------------------- References: 1) Green M., Schwarz J., Witten E., Superstring Theory Vol. 1,2, Cambridge Univ. Press, 1987 2) S.Klimenko, V.Talanov, I.Nikitin ``Singularities on the world sheets of open relativistic strings'', Preprint...

I have some doubts when dealing with non-renormalizable theories in fact le,s suppose we have a theory that is non-renormalizable for n>4 or n=4 then we could do the trick of triying to renormalize it in 4-e dimension being e a small parameter e>0 and after that take the limit e=0 (dimensional...

I am writing a paper on the Theory of Everything, and it's effect on mankind. I was wondering, how do you think the public would react if a theory of everything was discovered? How would the public accept a theory such as this (so large scale)? How would society change in general...

Meh, nobody looked.

I want to know how many Calabi-Yau manifolds there are in each of the 5 superstring theories. Can you point me in the right direction?

not really philisophical more pyscological but anyone got any theories on why we fear death? isn't it supposed to be the solution to our pain? I've got my theorieso n it but i want to hear others...

Karl Popper asserted, in brief, that all theories are eventually falsifiable. What of a theory (quantum mechanics?) that embodies probabilities such that its truth and falsity are apparent a priori (a violation of Goedel's logic?) If probabilistic theories are proved necessarily falsifiable...

Hi people. I have decided to go ahead with this on my own if no one helps me (nudge nudge, if anyone wants to help out on a rather large project, then feel free to email/PM me . Primarily my major concerns are webdesign, and possibly marketing/advertising aspects.) Anyway, the idea which I...

As theories go, here's something new. A very simple foundation theory based on Energy, with free software to back it up. http://www.gamert.co.uk

Hey guys! I was wondering, where could i find elucidating Physics books on String theories, quantum mechanics (QED, QCD, QFT, LQG, etc) and all related on the web? I've done some search, but all i could come up with was an electronics and engineering related forums, and that is not in my...

all theories in physics are incorrect ! yes that's right. because 100% percent of the theories are using; approximations, incorrect perturbations, assumptions and so on. that is not valid for the behaviour of nature. physics is a kind of battle to understand the nature not to modify it...

Are we so certain of dimensional fields as expressed in recent theories? true we know of three for certain, but can it be possible the 10 or 11 maybe even more dimensions are mirroring the 3 principle dimensions?

do string theories need gravitational radiation as in GR?

i can not seem to find any good or relevant information on the five different string theories and how they differ from one another. i know of, and to the best of my ability try to understand 'basic' M-theory but am very strapped for info on the other theories and their specifics. if some one...

I didn't know whether to put this one in maths or physics, but I'm interested on what people on PFs think are the consequences of Goedel's first incomplteness theorum are for physical theories in general and in particular for the idea of a single comphrehensive theory that can describe all...

Looking for theories that describe "time" The more radical the better. I'm trying to start up some interesting conversations about time at http://thinkbling.com/forum Please post any comments that you may have and want shared there. For now this will only be for this category.

"Even today -- the 34th anniversary of the Apollo 11 landing, the first arrival by astronauts on the lunar surface -- there are people who think the whole program was a sham." http://www.siliconvalley.com/mld/siliconvalley/6350437.htm

Chern-Simons theory is a 3d-TQFT and Crane-Yetter model is a 4d-TQFT There exist another Topological Quantum Field Theory apart of these two models?

can anyone tell me what the latest theories are for inter stellar propulsion, and has the problem of bone loss on long space flights been solved?

I've heard that if one of these theories is correct then the other must be wrong. What exactly is the conflict between these two theories?

I want that you tell me your crackpots ideas. I'm curious. Ideas against the mainstream, but that can be hidden pearls. There are some of mine: -For me the Universe is or an alive organism living in its own cosmos, or a creation/experiment of some kind of upper intelligence. I'm not sure what...

Here is a horribly misguided theory from my youth. I polished it up a bit and gave it a name. If anyone wants this theory, they can have it. MicroElectroMagnetoValence Theory Tenets:[list=1] The fundamental electric and magnetic charges are 1/6 of the elementary electric and magnetic...